$ git clone -n https://src.fedoraproject.org/rpms/wxGTK.git /var/lib/mock/f40-build-2644699-66515/root/chroot_tmpdir/scmroot/wxGTK
Cloning into '/var/lib/mock/f40-build-2644699-66515/root/chroot_tmpdir/scmroot/wxGTK'...
$ git fetch origin 1b7b7da0a567f392d2ff9cd688a5c32c4800b261:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/wxGTK
 * [new ref]         1b7b7da0a567f392d2ff9cd688a5c32c4800b261 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1b7b7da Enable wxLZMAInputStream (#2258458)